Cup lid



FIG. 1 is a front perspective view of the cup lid;

FIG. 2 is a first side view of the cup lid;

FIG. 3 is a front view of the cup lid;

FIG. 4 is a rear view of the cup lid;

FIG. 5 is a top view of the cup lid;

FIG. 6 is a bottom view of the cup lid; and,

FIG. 7 is a second side view of the cup lid.

The broken lines illustrate environmental structure and form no part of the claimed design. 

The ornamental design for a cup lid, as shown and described. 